Longview Sewage Lagoon No 4 dam
Longview Sewage Lagoon No 4
Longview Sewage Lagoon No 4, located in Longview, Washington, is a crucial infrastructure owned by the local government and regulated by the Washington Department of Ecology. This sewage lagoon plays a significant role in treating wastewater from the area, ensuring that the surrounding water bodies, including Tr-Coal Creek Slough-Offstream, are protected from pollution. Completed in 1987, this earth dam structure stands at a hydraulic height of 12 feet and a structural height of 4 feet, with a storage capacity of 60 acre-feet.
With a low hazard potential and a condition assessment that is currently not rated, Longview Sewage Lagoon No 4 serves its primary purpose effectively. Its design, comprising stone core and soil foundation, has been instrumental in managing wastewater and maintaining water quality in the region. The lagoon has a maximum discharge capacity of 8 cubic feet per second, providing adequate protection against flooding and overflow. Despite not having a designated spillway type or inspection frequency, this sewage lagoon remains a critical component of the local water resource management system.
As an essential part of the water infrastructure in Cowlitz County, Longview Sewage Lagoon No 4 offers insights into the state's commitment to environmental protection and sustainable water resource management practices. With its compliance with state regulations, state permitting, and enforcement measures, this sewage lagoon exemplifies the responsible stewardship of water resources in the region. As climate change continues to impact water availability and quality, facilities like Longview Sewage Lagoon No 4 play a vital role in safeguarding public health and the environment.
Dam data reference
Condition Assessment
- Satisfactory
- No existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
- Fair
- No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action.
- Poor
- A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency.
- Unsatisfactory
- A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
- Not Rated
- The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Hazard Potential Classification
- High
- Dams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
- Significant
- Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environmental damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
- Low
- Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
- Undetermined
- Dams for which a downstream hazard potential has not been designated or is not provided.
Plan around the weather
Same NOAA / yr.no feed Snoflo's iOS app uses. Watch the precipitation column on the meteogram -- rain on the basin upstream typically lifts inflow 24-72 hours later.
Next 5 days, hour by hour
Temperature line with weather symbols on top, snow + rain accumulation as columns, humidity as a dotted line.
5-day forecast table
Every 3 hours, broken out across temperature, snow, rain, humidity, and wind. Each cell is colour-coded relative to the column min/max.
| Time | Condition | Temp (°F) | Snow (in) | Rain (in) | Humidity (%) | Wind (mps) | Wind dir |
|---|---|---|---|---|---|---|---|
| Loading detailed forecast… | |||||||
15-day temperature & precipitation
Daily temperatures, snow, and rain projected over the next two weeks.
Nearby streamflow gauges
USGS streamgauges around Longview Sewage Lagoon No 4 -- inflows here typically show up in storage 24-72 hours later.
| Streamgauge | Discharge | View |
|---|---|---|
| Columbia River @ Beaver Army Terminal Nr Quincy | 301,000 cfs | → |
| Cowlitz River At Castle Rock | 6,530 cfs | → |
| Toutle River At Tower Road Near Silver Lake | 1,360 cfs | → |
| South Fork Toutle River At Toutle | 868 cfs | → |
| South Fork Chehalis River Near Wildwood | 56 cfs | → |
| Nf Toutle River Below Srs Near Kid Valley | 789 cfs | → |
Make a day of it
Boat launches, lakeside camping, fishing access, and other reservoirs near Longview Sewage Lagoon No 4.
Boat launches
- Ocean Beach Highway 6105, Longview
- Clatskanie City Park
- Beaver Boat Ramp And Park
- Kerr Road 500, Silver Lake
- Hendrickson Drive 333, Kalama
- Kerry West Marina
Campgrounds
- Hudson - Parcher County Park
- County Line Park
- Clatskanie City Park
- Seaquest State Park
- Seaquest State Park Campground
- Yurt Village
Paddle runs
- Headwaters In Sw1/4 Sec 28, T9n, R5e To Mount St. Helens National Volcanic Monument Boundary
- Nehalem River
- Nw1/4 Of Sec 9, T5n, R6e To Ne1/4 Of Sec 6, T5n, R5e
- Mount St. Helens National Volcanic Monument Boundary To Mount St. Helens National Volcanic Boundary In Sw 1/4 Of Sec 32, T11n, R5e
- Mount St. Helens National Volcanic Monument Boundary To To Point River Reenters Mshnvm In Se 1/4 Of Sec 11, T10n, R5e
- Headwaters In Sw 1/4 Of Sec 8, T4n, R6e To Gifford Pinchot Nf Boundary
Track Longview Sewage Lagoon No 4 in the Snoflo app
Save this dam as a favorite and get the local NOAA / yr.no forecast plus regional flow context wherever you are.
About Longview Sewage Lagoon No 4
Where does the data for Longview Sewage Lagoon No 4 come from?
Structural and regulatory data come from the U.S. Army Corps of Engineers' National Inventory of Dams (NID). Weather forecast comes from NOAA / yr.no -- the same feed Snoflo's iOS app uses.
How often is the report updated?
NID structural data refreshes annually as the Corps publishes updated assessments. The weather forecast refreshes throughout the day.
What does the Low hazard rating mean?
The Corps of Engineers' hazard potential classification grades probable consequences if the dam fails: High = probable loss of human life; Significant = no probable loss of human life but possible economic loss / environmental damage; Low = no probable loss of human life, only minor economic / environmental losses. See the Dam Data Reference card above for the full definitions.
What's "% of normal"?
The current storage value compared to the historical average storage on this calendar day. 100% = right on average; values above 100% mean above-normal storage (wet year); values below mean below-normal (dry year or drought).
Can I get alerts when storage crosses a threshold?
Yes -- alerts are managed in the Snoflo iOS app. Favorite this dam, set a threshold, and you'll get a push the moment conditions cross.
Other water bodies near here
Snoflo-tracked reservoirs and dams within driving distance of Longview Sewage Lagoon No 4.